Annotation of loncom/homework/structuretags.pm, revision 1.444.4.2.2.2

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.444.4.2.2.2! (raeburn    4:: # $Id: structuretags.pm,v 1.444.4.2.2.1 2009/11/27 21:20:44 www Exp $
1.74      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.254     www        28: ###
1.54      www        29: 
1.435     jms        30: =pod
                     31: 
                     32: =head1 NAME
                     33: 
                     34: Apache::structuretags
                     35: 
                     36: =head1 SYNOPSIS
                     37: 
                     38: 
                     39: This is part of the LearningOnline Network with CAPA project
                     40: described at http://www.lon-capa.org.
                     41: 
                     42: 
                     43: =head1 NOTABLE SUBROUTINES
                     44: 
                     45: =over
                     46: 
                     47: =item 
                     48: 
                     49: =back
                     50: 
                     51: =cut
                     52: 
1.133     sakharuk   53: 
1.1       albertel   54: package Apache::structuretags; 
                     55: 
                     56: use strict;
                     57: use Apache::lonnet;
1.101     sakharuk   58: use Apache::File();
1.147     www        59: use Apache::lonmenu;
1.210     albertel   60: use Apache::lonlocal;
1.231     sakharuk   61: use Apache::lonxml;
1.434     foxr       62: use Apache::londefdef;
1.338     albertel   63: use Apache::lonenc();
1.267     albertel   64: use Time::HiRes qw( gettimeofday tv_interval );
1.356     www        65: use lib '/home/httpd/lib/perl/';
                     66: use LONCAPA;
                     67:  
1.78      harris41   68: BEGIN {
1.397     albertel   69:     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','translated','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
1.10      albertel   70: }
                     71: 
                     72: sub start_web {
1.326     albertel   73:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.383     albertel   74:     if ($target ne 'edit' && $target ne 'modified') {
                     75: 	my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
                     76: 	if ($target eq 'web' || $target eq 'webgrade') {
                     77: 	    return $bodytext;
                     78: 	}
                     79:     } elsif ($target eq "edit" ) {
                     80: 	my $bodytext = 
                     81: 	    &Apache::lonxml::get_all_text_unbalanced("/web",$parser);
                     82: 	my $result = &Apache::edit::tag_start($target,$token);
                     83: 	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
                     84: 	return $result;
                     85:     } elsif ( $target eq "modified" ) {
                     86: 	return $token->[4].&Apache::edit::modifiedfield("/web",$parser);
1.159     albertel   87:     }
                     88:     return '';
1.10      albertel   89: }
                     90: 
                     91: sub end_web {
1.44      ng         92:     return '';
1.10      albertel   93: }
                     94: 
                     95: sub start_tex {
1.326     albertel   96:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.198     sakharuk   97:     my $result='';
1.383     albertel   98:     if ($target ne 'edit' && $target ne 'modified') {
                     99: 	my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
                    100: 	if ($target eq 'tex') {
1.434     foxr      101: 	    
                    102: 	    # If inside a table, occurrences of \\ must be removed;
                    103: 	    # else the table blows up.
                    104: 
                    105: 	    if (&Apache::londefdef::is_inside_of($tagstack, "table")) {
                    106: 		$bodytext =~ s/\\\\//g;
                    107: 	    }
1.432     foxr      108: 	    return $bodytext.'{}';
1.383     albertel  109: 	}
                    110:     } elsif ($target eq "edit" ) {
                    111: 	my $bodytext = 
                    112: 	    &Apache::lonxml::get_all_text_unbalanced("/tex",$parser);
                    113: 	my $result = &Apache::edit::tag_start($target,$token);
                    114: 	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
                    115: 	return $result;
                    116:     } elsif ( $target eq "modified" ) {
                    117: 	return $token->[4].&Apache::edit::modifiedfield("/tex",$parser);
1.159     albertel  118:     }
1.198     sakharuk  119:     return $result;;
1.10      albertel  120: }
                    121: 
                    122: sub end_tex {
1.44      ng        123:     return '';
1.9       albertel  124: }
                    125: 
1.400     albertel  126: sub homework_js {
                    127:     return &Apache::loncommon::resize_textarea_js().
1.416     raeburn   128:            &setmode_javascript().
1.400     albertel  129: 	<<'JS';
                    130: <script type="text/javascript">
                    131: function setSubmittedPart (part) {
                    132:    this.document.lonhomework.submitted.value="part_"+part;
                    133: }
                    134: 
                    135: function image_response_click (which, e) {
                    136:     init_geometry();
                    137:     if (!e) { e = window.event; } //IE
                    138:     var input_element = document.lonhomework.elements[which];
1.401     albertel  139:     var token_element = document.lonhomework.elements[which+'_token'];
1.400     albertel  140:     var token = token_element.value;
1.401     albertel  141:     var img_element   = document.getElementById(which+'_imageresponse');
1.400     albertel  142:     var x= e.clientX-getX(img_element)+Geometry.getHorizontalScroll();
                    143:     var y= e.clientY-getY(img_element)+Geometry.getVerticalScroll();
                    144:     var click = x+':'+y;
                    145:     input_element.value = click;
                    146:     img_element.src = '/adm/randomlabel.png?token='+token+'&clickdata='+click;
                    147: }
1.416     raeburn   148: 
1.400     albertel  149: </script>
                    150: JS
                    151: }
                    152: 
1.416     raeburn   153: sub setmode_javascript {
                    154:     return <<"ENDSCRIPT";
                    155: <script type="text/javascript">
                    156: function setmode(form,probmode) {
                    157:     form.problemmode.value = probmode;
                    158:     form.submit();
                    159: }
                    160: </script>
                    161: ENDSCRIPT
                    162: }
                    163: 
1.48      albertel  164: sub page_start {
1.345     albertel  165:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
                    166: 	$extra_head)=@_;
1.159     albertel  167:     my %found;
1.207     albertel  168:     foreach my $taginside (@$tagstack) {
1.159     albertel  169: 	foreach my $taglookedfor ('html','body','form') {
                    170: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                    171: 	}
                    172:     }
                    173: 
1.343     albertel  174:     if ($target eq 'tex') {
                    175: 	return
                    176: 	    &Apache::londefdef::start_html($target,$token,$tagstack,
                    177: 					   $parstack,$parser,$safeeval);
                    178:     }
                    179: 
1.400     albertel  180:     $extra_head .= &homework_js();
1.374     albertel  181: 
1.434     foxr      182:     if ($env{'environment.wysiwygeditor'} eq 'on') {
                    183: 	$extra_head .= &Apache::lonhtmlcommon::dragmath_js("FCKEditMathPopup");
                    184:     } else {
                    185:         $extra_head .= &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
1.425     raeburn   186:     }
                    187: 
1.344     albertel  188:     my %body_args;
                    189:     if (defined($found{'html'})) {
                    190: 	$body_args{'skip_phases'}{'head'}=1;
                    191:     } else {
1.343     albertel  192: 	
1.345     albertel  193: 	$extra_head .= &Apache::lonhtmlcommon::spellheader();
1.343     albertel  194: 
1.379     albertel  195: 	$extra_head .= &Apache::londefdef::generate_css_links();
                    196: 
1.384     albertel  197: 	if ($env{'request.state'} eq 'construct') {
1.343     albertel  198: 	    $extra_head.=&Apache::edit::js_change_detection().
                    199: 		"<script type=\"text/javascript\">\n".
                    200: 		"if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
                    201: 		&Apache::loncommon::browser_and_searcher_javascript().
                    202:                 "\n</script>\n";
                    203: 	}
1.159     albertel  204:     }
1.343     albertel  205: 
1.344     albertel  206:     if (defined($found{'body'})) {
                    207: 	$body_args{'skip_phases'}{'body'}=1;
                    208:     } elsif (!defined($found{'body'}) 
                    209: 	     && $env{'request.state'} eq 'construct') {
1.343     albertel  210: 	if ($target eq 'web' || $target eq 'edit') {
1.402     albertel  211: 	    if ($env{'environment.remote'} ne 'off') {
                    212: 		$body_args{'only_body'}  = 1;
                    213: 	    }
1.297     albertel  214: 	}
1.272     albertel  215:     } elsif (!defined($found{'body'})) {
1.343     albertel  216: 	my %add_entries;
1.159     albertel  217: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    218: 						  $safeeval);
1.343     albertel  219: 	if ($background ne '' ) {
                    220: 	    $add_entries{'background'} = $background;
                    221: 	}
1.344     albertel  222: 
1.290     albertel  223: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    224: 					       $safeeval);
1.344     albertel  225:        	if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
                    226: 
                    227: 	$body_args{'bgcolor'}        = $bgcolor;
                    228: 	$body_args{'no_title'}       = 1;
                    229: 	$body_args{'force_register'} = 1;
                    230: 	$body_args{'add_entries'}    = \%add_entries;	
1.391     albertel  231: 	if ($env{'environment.remote'} eq 'off'
                    232: 	    && $env{'request.state'} eq   'construct') {
                    233: 	    $body_args{'only_body'}  = 1;
                    234: 	}
1.344     albertel  235:     }
1.365     albertel  236:     $body_args{'no_auto_mt_title'} = 1;
1.344     albertel  237:     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
                    238: 						    \%body_args);
1.444.4.2.2.2! (raeburn  239::     unless ($env{'request.gcicontext'} eq 'buildtest') {
        !           240::         if (!defined($found{'body'}) 
        !           241:: 	    && $env{'request.state'} ne 'construct'
        !           242:: 	    && ($target eq 'web' || $target eq 'webgrade')) {
        !           243:: 
        !           244:: 	    my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
        !           245:: 	    if ($symb eq '' && !$publicuser) {
        !           246::                 $page_start .= '<p class="LC_info">'
        !           247::                               .&mt('Browsing resource, all submissions are temporary.')
        !           248::                               .'</p>';
        !           249::             }
        !           250::         }
        !           251::     }
1.344     albertel  252: 
1.409     albertel  253:     if (!defined($found{'body'}) && $env{'request.state'} ne 'construct') {
1.343     albertel  254: 	$page_start .= &Apache::lonxml::message_location();
1.159     albertel  255:     }
1.344     albertel  256:     
1.159     albertel  257:     my $form_tag_start;
                    258:     if (!defined($found{'form'})) {
1.337     albertel  259: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.338     albertel  260: 	my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.327     albertel  261: 	$form_tag_start.=$uri.'" ';
                    262: 	if ($target eq 'edit') {
                    263: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    264: 	}
1.368     albertel  265: 	$form_tag_start.='>'."\n";
1.355     albertel  266: 
                    267: 	my $symb=&Apache::lonnet::symbread();
                    268: 	if ($symb =~ /\S/) {
                    269: 	    $symb=
                    270: 		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
                    271: 	    $form_tag_start.=
1.368     albertel  272: 		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
1.355     albertel  273: 	}
1.159     albertel  274:     }
1.343     albertel  275:     return ($page_start,$form_tag_start);
1.105     albertel  276: }
                    277: 
1.141     matthew   278: #use Time::HiRes();
1.105     albertel  279: sub get_resource_name {
1.159     albertel  280:     my ($parstack,$safeeval)=@_;
1.388     foxr      281:     my $name;
1.204     albertel  282:     if (defined($Apache::lonhomework::name)) {
1.388     foxr      283: 	$name = $Apache::lonhomework::name;
                    284:     } else {
                    285: 	my ($symb)=&Apache::lonnet::whichuser();
1.392     albertel  286: 	$name=&Apache::lonnet::gettitle($symb);
1.388     foxr      287: 	if ($name eq '') {
                    288: 	    $name=&Apache::lonnet::EXT('resource.title');
                    289: 	    if ($name eq 'con_lost') { $name = ''; }
                    290: 	}
                    291: 	if ($name!~/\S+/) {
                    292: 	    $name=$env{'request.uri'};
                    293: 	    $name=~s-.*/([^/]+)$-$1-;
                    294: 	}
                    295: 	# The name has had html tags escaped:
                    296:        
                    297: 	$name=~s/&lt;/</gs;
                    298: 	$name=~s/&gt;/>/gs;
                    299: 
                    300: 	$Apache::lonhomework::name=$name;
1.204     albertel  301:     }
1.159     albertel  302:     return $name;
1.105     albertel  303: }
                    304: 
                    305: sub setup_rndseed {
1.159     albertel  306:     my ($safeeval)=@_;
                    307:     my $rndseed;
1.367     albertel  308:     my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  309:     if ($env{'request.state'} eq "construct" 
                    310: 	|| $symb eq '' 
                    311: 	|| $Apache::lonhomework::type eq 'practice'
                    312: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       313: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  314: 						['rndseed']);
1.284     albertel  315: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  316: 	if (!$rndseed) {
1.162     albertel  317: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    318: 	    if (!$rndseed) {
                    319: 		$rndseed=time;
                    320: 	    }
1.284     albertel  321: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  322: 	}
1.374     albertel  323: 	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    324: 	      && $env{'form.submitted'} eq 'yes')  ||
1.284     albertel  325: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  326: 	    srand(time);
                    327: 	    $rndseed=int(rand(2100000000));
1.284     albertel  328: 	    $env{'form.rndseed'}=$rndseed;
                    329: 	    delete($env{'form.resetdata'});
                    330: 	    delete($env{'form.newrandomization'});
1.159     albertel  331: 	}
1.187     albertel  332: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  333: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  334:         }
1.247     albertel  335:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    336: 	   $rndseed=&Apache::lonnet::rndseed();
                    337: 	}
1.221     albertel  338: 	if ($safeeval) {
                    339: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  340: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  341: 	}
1.159     albertel  342:     }
                    343:     return $rndseed;
1.105     albertel  344: }
                    345: 
1.268     albertel  346: sub remember_problem_state {
                    347:     return '
1.284     albertel  348:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    349:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    350:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  351: }
                    352: 
1.423     www       353: sub problem_edit_buttons {
                    354:    return  '
1.408     albertel  355: <div class="LC_edit_problem_discards">
1.416     raeburn   356:        <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
1.423     www       357:        ' onclick="javscript:setmode(this.form,'."'discard'".')"  />
1.416     raeburn   358:        <input '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'editxml'".')').' type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" />
1.407     albertel  359:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.408     albertel  360: </div>
                    361: <div class="LC_edit_problem_saves">
1.416     raeburn   362:        <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save and Edit').'" />
                    363:        <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
1.423     www       364: </div>';
                    365: }
                    366: 
                    367: sub problem_edit_header {
                    368:     return '<input type="hidden" name="submitted" value="edit" /><input type="hidden" name="problemmode" value="edit" />'.
                    369: 	&Apache::structuretags::remember_problem_state().'
                    370: <div class="LC_edit_problem_header">
                    371: <div class="LC_edit_problem_header_title">
                    372: '.&mt('Problem Editing').&Apache::loncommon::help_open_menu('Problem Editing','Problem_Editor_XML_Index',5,'Authoring').'
                    373: </div>'.
                    374: &problem_edit_buttons().'
1.408     albertel  375: <hr class="LC_edit_problem_divide" />
1.409     albertel  376: '.&Apache::lonxml::message_location().'
1.408     albertel  377: </div>
                    378: '.
1.282     albertel  379:        '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  380: }
                    381: 
                    382: sub problem_edit_footer {
1.412     albertel  383:     return '</td></tr></table><br />
                    384: <div class="LC_edit_problem_footer">
1.423     www       385:   <hr class="LC_edit_problem_divide" />'.
                    386: &problem_edit_buttons().'
1.412     albertel  387:   <hr class="LC_edit_problem_divide" />
                    388: </div>
                    389: '.
                    390: 
1.348     albertel  391:     &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
1.342     albertel  392:     "\n</form>\n".&Apache::loncommon::end_page();
1.105     albertel  393: }
                    394: 
1.235     albertel  395: sub option {
                    396:     my ($value,$name) = @_;
                    397:     my $result ="<option value='".$value."' ";
1.284     albertel  398:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  399: 	$result.=" selected='on' ";
                    400:     }
                    401:     $result.='>';
                    402:     return $result;
                    403: }
                    404: 
1.105     albertel  405: sub problem_web_to_edit_header {
1.159     albertel  406:     my ($rndseed)=@_;
1.406     albertel  407:     my $result .= '<div class="LC_edit_problem_header">';
                    408: 
                    409:     if (!$Apache::lonhomework::parsing_a_task) {
                    410: 	$result .= 
                    411: 	    '<div class="LC_edit_problem_header_title">'.
                    412: 	    &mt('Problem Testing').
                    413: 	    &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area').
                    414: 	    '</div>';
                    415:     } else {
                    416: 	$result .= 
                    417: 	    '<div class="LC_edit_problem_header_title">'.
                    418: 	    &mt('Task Testing').
                    419: 	    '</div>';
                    420:     }
                    421:     
1.444.4.1  raeburn   422:     my $show_all_foils_text =
                    423:         ($Apache::lonhomework::parsing_a_task) ?
                    424:         &mt('Show All Instances')
                    425:         : &mt('Show All Foils');
1.315     albertel  426: 
1.444.4.1  raeburn   427:     my $show_all= '<span class="LC_nobreak"><label for="showallfoils">'
                    428:                  .'<input type="checkbox" name="showallfoils"';
1.440     bisitz    429:     if (defined($env{'form.showallfoils'})) { $show_all.=' checked="checked"'; }
1.444.4.1  raeburn   430:     $show_all.= ' /> '.$show_all_foils_text
                    431:                .'</label></span>';
1.406     albertel  432: 
                    433: 
1.384     albertel  434: 
1.406     albertel  435:     $result .= '<div class="LC_edit_problem_header_status_row">';
1.313     albertel  436:     if (!$Apache::lonhomework::parsing_a_task) {
                    437: 	$result.="
1.406     albertel  438: <div class='LC_edit_problem_header_row1'>
                    439: <span class=\"LC_nobreak\">
1.405     albertel  440: ".&mt("Problem Status:")."
1.235     albertel  441: <select name='problemstate'>
1.270     albertel  442:   <option value=''></option>
1.235     albertel  443:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    444:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    445:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    446:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    447:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    448: </select>
1.406     albertel  449: </span>
                    450: <span class=\"LC_nobreak\">
1.405     albertel  451: ".&mt("Problem Type:")."
1.235     albertel  452: <select name='problemtype'>
1.270     albertel  453:   <option value=''></option>
1.242     albertel  454:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
1.428     raeburn   455:   ".&option('problem','problemtype').&mt("Homework Problem")."</option>
1.242     albertel  456:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.428     raeburn   457:   ".&option('practice' ,'problemtype').&mt("Practice Problem")."</option>
1.235     albertel  458: </select>
1.406     albertel  459: </span>
                    460: $show_all
                    461: </div>
                    462: <div class='LC_edit_problem_header_row2'>
                    463: <span class=\"LC_nobreak\">
1.405     albertel  464: ".&mt("Feedback Mode:")."
1.235     albertel  465: <select name='problemstatus'>
                    466:   <option value=''></option>
1.242     albertel  467:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
1.405     albertel  468:   ".&option('no', 'problemstatus').&mt("Don't Show Incorect/Correct Feedback")."</option>
                    469:   ".&option('no_feedback_ever', 'problemstatus').&mt("Don't Show Any Feedback")."</option>
1.235     albertel  470: </select>
1.406     albertel  471: </span>
                    472: ";
                    473: 
1.376     albertel  474:     } elsif ($Apache::lonhomework::parsing_a_task) {
                    475: 	$result.="
1.406     albertel  476: <div class='LC_edit_problem_header_row1'>
                    477: <span class=\"LC_nobreak\">
1.405     albertel  478: ".&mt("Problem Status:")."
1.376     albertel  479: <select name='problemstate'>
                    480:   <option value=''></option>
                    481:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    482:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    483:   ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
                    484:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
                    485: </select>
1.406     albertel  486: </span>
                    487: $show_all
                    488: ";
                    489:     }
                    490:     $result.='
                    491:        <span class="LC_nobreak">
                    492:        '.&mt('Apply style file: ').'
                    493:          <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
                    494:          <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
                    495:        </span>
1.422     www       496:      </div>
                    497:      <div class="LC_edit_problem_header_row1">'.
                    498:        &Apache::lonxml::renderingoptions().'
1.406     albertel  499:      </div>
                    500:      <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
                    501:      <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
                    502:      <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
                    503:    </div>
                    504:    <hr class="LC_edit_problem_divide" />
                    505:    <div class="LC_edit_problem_header_randomize_row">
                    506:      <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    507:      <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
                    508:      <input type="text" name="rndseed" size="10" value="'.
                    509: 	       $rndseed.'"
                    510:              onchange="javascript:document.lonhomework.changerandseed.click()" />';
                    511: 
                    512:     if (!$Apache::lonhomework::parsing_a_task) {
                    513: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    514: 	if (!$numtoanalyze) { $numtoanalyze=20; }
1.408     albertel  515: 	$result .= '<span class="LC_nobreak">'.
                    516: 	    &mt('[_1] for [_2] versions.',
1.416     raeburn   517: 		'<input type="button" name="submitmode" value="'.&mt('Calculate answers').'" '.
1.419     bisitz    518:                 'onclick="javascript:setmode(this.form,'."'calcanswers'".')" />'
                    519:                ,'<input type="text" name="numtoanalyze" value="'.
1.408     albertel  520: 		$numtoanalyze.'" size="5" />').
                    521: 		&Apache::loncommon::help_open_topic("Analyze_Problem",'',undef,undef,300).
                    522: 		'</span>';
                    523: 						    
1.313     albertel  524:     }
1.406     albertel  525: 
                    526:     $result.='
                    527:    </div>
1.408     albertel  528:    <div class="LC_edit_problem_header_edit_row">';
1.416     raeburn   529:     $result.='<input type="hidden" name="problemmode" value="view" />';
                    530:     $result .= '<input type="button" name="submitmode" accesskey="e" value="'.&mt('Edit').'" '.
                    531:                'onclick="javascript:setmode(this.form,'."'edit'".')" />';
                    532:     $result .= '<input type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" '.
                    533:                'onclick="javascript:setmode(this.form,'."'editxml'".')" />';
1.408     albertel  534:     $result.='
                    535:    </div>
1.409     albertel  536:    '.&Apache::lonxml::message_location().'
1.406     albertel  537: </div>';
1.159     albertel  538:     return $result;
1.48      albertel  539: }
                    540: 
1.65      albertel  541: sub initialize_storage {
1.357     albertel  542:     my ($given_symb) = @_;
1.353     albertel  543:     undef(%Apache::lonhomework::results);
                    544:     undef(%Apache::lonhomework::history);
1.357     albertel  545:     my ($symb,$courseid,$domain,$name) = 
1.367     albertel  546: 	&Apache::lonnet::whichuser($given_symb);
1.353     albertel  547:     
                    548:     # anonymous users (CODEd exams) have no data
                    549:     if ($name eq 'anonymous' 
                    550: 	&& !defined($domain)) {
                    551: 	return;
                    552:     }
                    553: 
1.333     albertel  554:     if ($env{'request.state'} eq 'construct' 
                    555: 	|| $symb eq ''
                    556: 	|| $Apache::lonhomework::type eq 'practice') {
                    557: 	
                    558: 	my $namespace = $symb || $env{'request.uri'};
                    559: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
1.374     albertel  560: 	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    561: 	     && $env{'form.submitted'} eq 'yes') ||
1.333     albertel  562: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    563: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    564: 	    &Apache::lonxml::debug("Attempt reset");
                    565: 	}
1.159     albertel  566: 	%Apache::lonhomework::history=
1.333     albertel  567: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  568: 	my ($temp)=keys %Apache::lonhomework::history ;
                    569: 	&Apache::lonxml::debug("Return message of $temp");
                    570:     } else {
                    571: 	%Apache::lonhomework::history=
                    572: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    573:     }
1.353     albertel  574: 
1.159     albertel  575:     #ignore error conditions
1.67      albertel  576:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  577:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  578: }
                    579: 
1.435     jms       580: =pod
                    581: 
                    582: =item finalize_storage()
                    583: 
                    584: 	Stores away the result has to a student's environment
                    585: 	checks form.grade_ for specific values, other wises stores
                    586: 	to the running users environment
                    587: 	Will increment totals for attempts, students, and corrects
                    588: 	if running user has student role.
                    589: 	
                    590: =cut
                    591: 
                    592: 
1.65      albertel  593: sub finalize_storage {
1.357     albertel  594:     my ($given_symb) = @_;
1.159     albertel  595:     my $result;
1.289     albertel  596:     if (%Apache::lonhomework::results) {
1.323     albertel  597: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    598: 	delete(@Apache::lonhomework::results{@remove});
1.357     albertel  599: 	my ($symb,$courseid,$domain,$name) = 
1.367     albertel  600: 	    &Apache::lonnet::whichuser($given_symb);
1.333     albertel  601: 	if ($env{'request.state'} eq 'construct' 
                    602: 	    || $symb eq ''
                    603: 	    || $Apache::lonhomework::type eq 'practice') {
                    604: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  605: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  606: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  607: 					      $namespace,'',$domain,$name);
1.159     albertel  608: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    609: 	} else {
                    610: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    611: 					    $symb,$courseid,$domain,$name);
                    612: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   613:             if ($env{'request.role'} =~/^st/) {
                    614:                 &store_aggregates($symb,$courseid);
                    615:             }
1.159     albertel  616: 	}
1.323     albertel  617:     } else {
                    618: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  619:     }
1.159     albertel  620:     return $result;
1.65      albertel  621: }
                    622: 
1.435     jms       623: =pod
                    624: 
                    625: item store_aggregates()
                    626: 
                    627: 	Sends hash of values to be incremented in nohist_resourcetracker.db
                    628: 	for the course. Increments total number of attempts, unique students 
                    629: 	and corrects for each part for an instance of a problem, as appropriate.
                    630: 	
                    631: =cut
                    632: 
1.285     raeburn   633: sub store_aggregates {
                    634:     my ($symb,$courseid) = @_;
1.286     albertel  635:     my %aggregate;
                    636:     my @parts;
1.288     albertel  637:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    638:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  639:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  640:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  641:             push(@parts, $1);
1.285     raeburn   642:         }
                    643:     }
1.286     albertel  644:     foreach my $part (@parts) {
                    645:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    646: 	    eq 'APPROX_ANS' ||
                    647: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    648: 	    eq 'EXACT_ANS') {
1.287     albertel  649:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   650:         }
1.286     albertel  651:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  652:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   653:         } else {
1.293     albertel  654:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   655:             if ($last_reset) {
1.293     albertel  656:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   657:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    658:                 }
                    659:             }
1.285     raeburn   660:         }
1.287     albertel  661:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   662:     }
1.292     raeburn   663:     if (keys (%aggregate) > 0) {
1.289     albertel  664: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   665:                             $cdomain,$cname);
                    666:     }
                    667: }
1.289     albertel  668: 
1.65      albertel  669: sub checkout_msg {
1.211     albertel  670:     my %lt=&Apache::lonlocal::texthash( 
                    671: 		'resource'=>'The resource needs to be checked out',
                    672: 		'id_expln'=>'As a resource gets checked out, a unique timestamped ID is given to it, and a permanent record is left in the system.',
                    673:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    674:                 'checkout'=>'Check out Exam for Viewing',
                    675: 		'checkout?'=>'Check out Exam?');
1.352     albertel  676:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel  677:     return (<<ENDCHECKOUT);
1.211     albertel  678: <h2>$lt{'resource'}</h2>
                    679:     <p>$lt{'id_expln'}</p>
1.444.4.1  raeburn   680: <p class="LC_warning">$lt{'warning'}</p>
1.444     bisitz    681: <form name="checkout" method="post" action="$uri">
1.91      albertel  682: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  683: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  684: </form>
                    685: ENDCHECKOUT
                    686: }
                    687: 
1.252     albertel  688: sub firstaccess_msg {
1.253     albertel  689:     my ($time,$symb)=@_;
1.414     albertel  690:     my $result;
                    691:     my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    692:     if ($interval[1] eq 'map') {
                    693: 	my ($map)=&Apache::lonnet::decode_symb($symb);
                    694: 	my $foldertitle=&Apache::lonnet::gettitle($map);
                    695:     
                    696: 	&Apache::lonxml::debug("map is $map title is $foldertitle");
1.418     bisitz    697: 	$result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    698:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    699:                              ,$foldertitle,$time)."</h2>";
1.414     albertel  700:     } elsif ($interval[1] eq 'course') {
                    701: 	my $course = $env{'course.'.$env{'request.course.id'}.'.description'};
1.418     bisitz    702:         $result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    703:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    704:                              ,$course,$time)."</h2>";
1.414     albertel  705:     } else {
                    706: 	my $title=&Apache::lonnet::gettitle($symb);
1.418     bisitz    707:         $result .= "<h2>".&mt('This resource "[_1]" is open for a limited time.'
                    708:                              .' Once you click the "Show Resource" button below you have [_2] to complete this resource "[_1]".'
                    709:                              ,$title,$time)."</h2>";
1.414     albertel  710:     }
1.352     albertel  711:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.418     bisitz    712:     my $buttontext = &mt('Show Resource');
                    713:     my $timertext = &mt('Start Timer?');
1.414     albertel  714:     $result .= (<<ENDCHECKOUT);
1.444     bisitz    715: <form name="markaccess" method="post" action="$uri">
1.252     albertel  716: <input type="hidden" name="markaccess" value="yes" />
1.418     bisitz    717: <input type="button" name="accessbutton" value="$buttontext" onClick="javascript:if (confirm('$timertext')) { document.markaccess.submit(); }" />
1.252     albertel  718: </form>
                    719: ENDCHECKOUT
1.414     albertel  720:     return $result;
1.252     albertel  721: }
                    722: 
1.204     albertel  723: sub init_problem_globals {
                    724:     my ($type)=@_;
                    725:     #initialize globals
1.308     foxr      726:     #   For problems, we start out in part 0 (outside a <part> tag).
                    727:     #   and part 0 is used to describe the main body of the <problem>
                    728:     #
1.204     albertel  729:     if ($type eq 'problem') {
                    730: 	$Apache::inputtags::part='0';
                    731: 	@Apache::inputtags::partlist=('0');
1.405     albertel  732: 	&Apache::lonhomework::set_show_problem_status(&get_problem_status('0'));
1.266     albertel  733: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      734: 
1.266     albertel  735:     } elsif ($type eq 'library') {
1.204     albertel  736: 	$Apache::inputtags::part='';
                    737: 	@Apache::inputtags::partlist=();
1.405     albertel  738: 	&Apache::lonhomework::reset_show_problem_status();
1.266     albertel  739: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      740: 
1.304     albertel  741:     } elsif ($type eq 'Task') {
                    742: 	$Apache::inputtags::part='0';
                    743: 	@Apache::inputtags::partlist=('0');
1.405     albertel  744: 	&Apache::lonhomework::reset_show_problem_status();
1.304     albertel  745: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  746:     }
                    747:     @Apache::inputtags::responselist = ();
                    748:     @Apache::inputtags::importlist = ();
                    749:     @Apache::inputtags::previous=();
                    750:     @Apache::inputtags::previous_version=();
                    751:     $Apache::structuretags::printanswer='No';
                    752:     @Apache::structuretags::whileconds=();
                    753:     @Apache::structuretags::whilebody=();
                    754:     @Apache::structuretags::whileline=();
                    755:     $Apache::lonhomework::scantronmode=0;
                    756:     undef($Apache::lonhomework::name);
1.358     albertel  757:     undef($Apache::lonhomework::default_type);
                    758:     undef($Apache::lonhomework::type);
1.204     albertel  759: }
                    760: 
                    761: sub reset_problem_globals {
                    762:     my ($type)=@_;
                    763:     undef(%Apache::lonhomework::history);
                    764:     undef(%Apache::lonhomework::results);
                    765:     undef($Apache::inputtags::part);
1.208     albertel  766: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    767: #detect if we try to do 2 problems in one file
                    768: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  769:     undef($Apache::lonhomework::name);
1.358     albertel  770:     undef($Apache::lonhomework::default_type);
                    771:     undef($Apache::lonhomework::type);
                    772:     undef($Apache::lonhomework::scantronmode);
                    773:     undef($Apache::lonhomework::ignore_response_errors);
1.405     albertel  774:     &Apache::lonhomework::reset_show_problem_status();
1.204     albertel  775: }
                    776: 
1.241     albertel  777: sub set_problem_state {
1.240     albertel  778:     my ($part)=@_;
1.284     albertel  779:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  780: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    781: 	    'correct_by_student';
                    782:     }
                    783: }
                    784: 
1.241     albertel  785: sub get_problem_status {
                    786:     my ($part)=@_;
1.267     albertel  787:     my $problem_status;
1.284     albertel  788:     if ($env{'request.state'} eq 'construct' &&
                    789: 	defined($env{'form.problemstatus'})) {
                    790: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  791:     } else {
                    792: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    793: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  794: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  795:     }
                    796:     return $problem_status;
                    797: }
                    798: 
1.9       albertel  799: sub start_problem {
1.326     albertel  800:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  801: 
1.311     foxr      802:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  803:     if (!$Apache::lonxml::metamode) {
                    804: 	&Apache::lonxml::startredirection();
                    805:     }
1.311     foxr      806: 
1.308     foxr      807:     # Problems don't nest and we don't allow more than one <problem> in
                    808:     # a .problem file.
                    809:     #
1.184     albertel  810:     if ( $Apache::inputtags::part ne '' ||
                    811: 	 $Apache::lonhomework::parsing_a_problem) {
                    812: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  813: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  814: 	return '';
                    815:     }
1.184     albertel  816: 
                    817:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  818:     &init_problem_globals('problem');
1.166     albertel  819: 
1.284     albertel  820:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  821: 	$Apache::lonhomework::scantronmode=1;
                    822:     }
1.161     albertel  823: 
1.159     albertel  824:     if ($target ne 'analyze') {
1.415     raeburn   825:         my $type = &Apache::lonnet::EXT('resource.0.type');
                    826: 	$Apache::lonhomework::type=$type;
1.284     albertel  827: 	if (($env{'request.state'} eq 'construct') &&
1.410     albertel  828: 	    $env{'form.problemtype'} =~ /\S/) {
1.284     albertel  829: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  830: 	}
1.332     albertel  831: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  832:     }
1.164     albertel  833:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  834: 	my $uri=$env{'request.uri'};
1.159     albertel  835: 	if ($uri=~/\.(\w+)$/) {
                    836: 	    $Apache::lonhomework::type=$1;
                    837: 	    &Apache::lonxml::debug("Using type of $1");
                    838: 	} else {
                    839: 	    $Apache::lonhomework::type='problem';
                    840: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    841: 	}
1.87      albertel  842:     }
1.301     albertel  843:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       844: 
1.363     albertel  845:     &initialize_storage();
1.389     albertel  846:     if ($target ne 'analyze'
                    847:        	&& $env{'request.state'} eq 'construct') {
                    848: 	&set_problem_state('0');
                    849:     }
                    850: 
1.366     albertel  851:     if ($target eq 'web') {
                    852: 	&Apache::lonxml::debug(" grading history ");
                    853: 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
                    854:     }
1.363     albertel  855: 
1.159     albertel  856:     #added vars to the scripting enviroment
1.213     albertel  857:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  858:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  859:     &Apache::run::run($expression,$safeeval);
1.159     albertel  860:     my $status;
                    861:     my $accessmsg;
                    862: 
1.343     albertel  863:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  864:     my ($result,$form_tag_start);
1.354     albertel  865:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                    866: 	|| $target eq 'edit') {
1.350     albertel  867: 	($result,$form_tag_start) =
                    868: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    869: 			$name);
                    870:     }
                    871: 
1.284     albertel  872:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  873: 
                    874:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    875:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    876: 	$target eq 'tex') {
                    877: 	#handle exam checkout
                    878: 	if ($Apache::lonhomework::type eq 'exam') {
                    879: 	    my $token=
                    880: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  881: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  882: 		$token=&Apache::lonxml::maketoken();
                    883: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    884: 		    $token;
                    885: 	    }
1.343     albertel  886: 	    $result.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  887: 	}
1.284     albertel  888: 	if ($env{'form.markaccess'}) {
1.414     albertel  889: 	    my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    890: 	    &Apache::lonnet::set_first_access($interval[1]);
1.252     albertel  891: 	}
1.159     albertel  892: 	#handle rand seed in construction space
                    893: 	my $rndseed=&setup_rndseed($safeeval);
1.367     albertel  894: 	my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  895: 	if ($env{'request.state'} ne "construct" && 
                    896: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  897: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
1.444.4.2.2.1  (www      898:: 		$rndseed.'" />';
1.444.4.2.2.2! (raeburn  899::             unless ($env{'request.gcicontext'} eq 'buildtest') {
        !           900:: 		$form_tag_start .= '<input type="submit" name="resetdata"
        !           901::                              value="'.&mt('New Problem Variation').'" />';
        !           902::             }
1.334     albertel  903: 	    if (exists($env{'form.username'})) {
                    904: 		$form_tag_start.=
1.164     albertel  905: 		    '<input type="hidden" name="username"
1.284     albertel  906:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  907: 	    }
1.444.4.2.2.2! (raeburn  908::             unless ($env{'request.gcicontext'} eq 'buildtest') {
        !           909::                 if ($env{'request.role.adv'}) {
        !           910::                     $form_tag_start.= ' <label class="LC_nobreak">'
        !           911::                              .'<input type="checkbox" name="showallfoils"';
        !           912::                     if (defined($env{'form.showallfoils'})) {
        !           913::                         $form_tag_start.=' checked="checked"';
        !           914::                     }
        !           915::                     $form_tag_start.= ' /> '
        !           916::                                      .&mt('Show All Foils')
        !           917::                                      .'</label>';
        !           918::                 }
        !           919:: 	    }
1.417     www       920:             if ($Apache::lonhomework::type eq 'practice') {
1.428     raeburn   921:                 $form_tag_start.=&practice_problem_header();
1.417     www       922:             }
1.444.4.2.2.2! (raeburn  923::             unless ($env{'request.gcicontext'} eq 'buildtest') {
        !           924:: 	        $form_tag_start.='<hr />';
        !           925::             }
1.162     albertel  926: 	}
1.324     albertel  927: 
                    928: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    929: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  930: 	push (@Apache::inputtags::status,$status);
1.324     albertel  931: 
1.159     albertel  932: 	my $expression='$external::datestatus="'.$status.'";';
                    933: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    934: 	&Apache::run::run($expression,$safeeval);
                    935: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  936: 
1.159     albertel  937: 	if (( $status eq 'CLOSED' ) ||
                    938: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  939: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  940: 	    ( $status eq 'BANNED') ||
1.216     albertel  941: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  942: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  943: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  944: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    945: 						       $style);
1.159     albertel  946: 	    if ( $target eq "web" ) {
1.343     albertel  947: 		my $msg;
1.159     albertel  948: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  949: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.441     raeburn   950:                 } elsif ($status eq 'NOT_IN_A_SLOT') {
                    951:                     $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
1.253     albertel  952: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  953: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  954: 		}
1.216     albertel  955: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.393     www       956: 		    $msg.=&mt('The problem ').$accessmsg;
1.159     albertel  957: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  958: 		    $msg.=&checkout_msg();
1.252     albertel  959: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  960: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  961: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
1.441     raeburn   962: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
1.159     albertel  963: 		}
                    964: 		$result.=$msg.'<br />';
                    965: 	    } elsif ($target eq 'tex') {
1.332     albertel  966: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    967: 		                    : '\begin{minipage}{\textwidth}';
1.443     foxr      968: 		$result.='\noindent \vskip 1 mm '.
1.332     albertel  969: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  970: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  971: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  972: 		} else {
1.211     albertel  973: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  974: 		}
                    975: 	    }
1.324     albertel  976: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  977: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    978: 						       $style);
1.324     albertel  979: 	    if ($target eq 'web') {
1.375     albertel  980: 		$result .= 
                    981: 		    &Apache::bridgetask::proctor_validation_screen($slot);
1.324     albertel  982: 	    } elsif ($target eq 'grade') {
                    983: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    984: 							'problem');
                    985: 	    }
1.159     albertel  986: 	} elsif ($target eq 'web') {
1.360     albertel  987: 	    if ($status eq 'CAN_ANSWER' 
                    988: 		&& $slot_name ne ''
                    989: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                    990: 		# unproctored slot access, self checkin
                    991: 		&Apache::bridgetask::check_in('problem',undef,undef,
                    992: 					      $slot_name);
                    993: 	    }
1.368     albertel  994: 	    $result.="\n $form_tag_start \t".	
1.227     albertel  995: 	      '<input type="hidden" name="submitted" value="yes" />';
                    996: 	    # create a page header and exit
1.284     albertel  997: 	    if ($env{'request.state'} eq "construct") {
                    998: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.428     raeburn   999:                 if ($Apache::lonhomework::type eq 'practice') {
                   1000:                     $result.= '<input type="submit" name="resetdata" '.
                   1001:                               'value="'.&mt('New Problem Variation').'" />'.
                   1002:                               &practice_problem_header().'<hr />';
                   1003:                 }
1.227     albertel 1004: 	    }
                   1005: 	    # if we are viewing someone else preserve that info
1.284     albertel 1006: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel 1007: 		foreach my $field ('symb','courseid','domain','username') {
                   1008: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel 1009: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel 1010: 		}
                   1011: 	    }
                   1012: 	} elsif ($target eq 'tex') {
1.319     foxr     1013: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                   1014: 
1.99      sakharuk 1015: 	}
1.159     albertel 1016:     } elsif ($target eq 'edit') {
1.343     albertel 1017: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel 1018: 	$Apache::lonxml::warnings_error_header=
                   1019: 	    &mt("Editor Errors - these errors might not effect the running of the problem, but they will likely cause problems with further use of the Edit mode. Please use the EditXML mode to fix these errors.")."<br />";
1.159     albertel 1020: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1021: 	$result.=$temp;
                   1022:     } elsif ($target eq 'modified') {
                   1023: 	$result=$token->[4];
                   1024:     } else {
                   1025: 	# page_start returned a starting result, delete it if we don't need it
                   1026: 	$result = '';
1.99      sakharuk 1027:     }
1.159     albertel 1028:     return $result;
1.9       albertel 1029: }
                   1030: 
                   1031: sub end_problem {
1.159     albertel 1032:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel 1033:     my $result;
1.310     foxr     1034: 
1.321     albertel 1035:     if (!$Apache::lonxml::metamode) {
                   1036: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel 1037: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1038:     }
1.319     foxr     1039: 
                   1040:     if ($target eq 'tex') {
1.321     albertel 1041: 	# Figure out the front matter and replace the
                   1042: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                   1043: 	# this in end_problem because whether or not we display due
                   1044: 	# dates depends on whether due dates have already been
                   1045: 	# displayed in the problem parts.
                   1046: 
1.319     foxr     1047: 	my $frontmatter   = '';
                   1048: 	my $startminipage = '';
                   1049: 	if (not $env{'form.problem_split'}=~/yes/) {
                   1050: 	    $startminipage = '\begin{minipage}{\textwidth}';
                   1051: 	}
                   1052: 	my $id = $Apache::inputtags::part;
                   1053: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                   1054: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                   1055: 	my @packages = split /,/,$packages;
                   1056: 	my $allow_print_points = 0;
                   1057: 	foreach my $partial_key (@packages) {
                   1058: 	    if ($partial_key=~m/^part_0$/) {
                   1059: 		$allow_print_points=1;
                   1060: 	    }
                   1061: 	}
                   1062: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1063: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                   1064: 	if (lc($env{'course.'.$env{'request.course.id'}.
                   1065: 			'.disableexampointprint'}) eq 'yes') {
                   1066: 	    $allow_print_points=0;
                   1067: 	}
                   1068: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
1.443     foxr     1069: 	my $begin_doc=' \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
1.319     foxr     1070: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                   1071: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                   1072: 	
                   1073: 	#  Figure out what the due date is and if we need to print
                   1074: 	#  it in the problem header.  We have been logging the
                   1075: 	#  last due date written to file. 
                   1076: 	
1.444.4.1  raeburn  1077: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate");
1.319     foxr     1078: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
1.444.4.1  raeburn  1079:         my $duedate_text = &mt('Due date: [_1]'
                   1080:                               ,&Apache::lonlocal::locallocaltime($duetime));
1.319     foxr     1081: 	my $temp_file;
                   1082: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                   1083: 	
                   1084: 	# Figure out what the last printed due date is or set it
                   1085: 	# to the epoch if no duedates have been printed.
                   1086: 	
                   1087: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                   1088: 	if (-e $filename) {
                   1089: 	    $temp_file = Apache::File->new($filename);
                   1090: 	    my @due_file      = <$temp_file>;
                   1091: 	    $due_file_content = $due_file[$#due_file];
                   1092: 	    chomp $due_file_content;
                   1093: 	} 
                   1094: 	
                   1095: 	# We display the due date iff it is not the same as the last
                   1096: 	# duedate in problem header ($due_file_content), and
                   1097: 	# none of our parts displayed a duedate.
                   1098: 	#
                   1099: 	my $parts_with_displayduedate;
                   1100: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                   1101: 	    $parts_with_displayduedate = 
                   1102: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                   1103: 	} else {
                   1104: 	    $parts_with_displayduedate = 0;
                   1105: 	}
                   1106: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                   1107: 	    $temp_file = Apache::File->new('>'.$filename);
                   1108: 	    print $temp_file "$duetime\n";
                   1109: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1110: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                   1111: 		    $frontmatter .= $begin_doc.
1.444.4.1  raeburn  1112: 			'\textit{'.$duedate_text.'} '.$toc_line;
1.319     foxr     1113: 		} else {
                   1114: 		    $frontmatter.= $begin_doc.$toc_line;
                   1115: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                   1116: 		}
                   1117: 	    } else {
1.444.4.1  raeburn  1118: 		$frontmatter .= '\vskip 1mm\textit{'.$duedate_text.'} \\\\\\\\'.$startminipage;
1.319     foxr     1119: 	    }
                   1120: 	} else {
                   1121: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1122: 		$frontmatter .= $begin_doc.$toc_line;
                   1123: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                   1124: 	    } else {
1.381     albertel 1125: 		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
1.319     foxr     1126: 	    }
                   1127: 	}
                   1128: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                   1129:     }
                   1130: 
1.159     albertel 1131:     my $status=$Apache::inputtags::status['-1'];
                   1132:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                   1133: 	$target eq 'tex') {
1.249     albertel 1134: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel 1135: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel 1136: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                   1137: 		&Apache::inputtags::grade;
1.324     albertel 1138: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                   1139: 		# no need to grade, and don't want to hide data
1.249     albertel 1140: 	    } else {
                   1141: 		# move any submission data to .hidden
                   1142: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1143: 	    }
1.159     albertel 1144: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                   1145: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel 1146: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel 1147: 	    # if part is zero, no <part>s existed, so we need show the current
                   1148: 	    # grading status
                   1149: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                   1150: 	    $result.= $gradestatus;
                   1151: 	}
                   1152: 	if (
1.284     albertel 1153: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel 1154: 	    ($target eq 'answer') || ($target eq 'tex')
                   1155: 	   ) {
1.227     albertel 1156: 	    if ($target ne 'tex' &&
1.284     albertel 1157: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www      1158: 		$result.="</form>";
1.348     albertel 1159: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel 1160: 	    }
                   1161: 	    if ($target eq 'web') {
1.346     albertel 1162: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1163: 	    } elsif ($target eq 'tex') {
1.178     sakharuk 1164: 		my $endminipage = '';
1.284     albertel 1165: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk 1166: 		    $endminipage = '\end{minipage}';
                   1167: 		}
1.284     albertel 1168:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk 1169: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel 1170: 		} else {
1.262     sakharuk 1171: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel 1172: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk 1173: 			$result .= $endminipage.'\end{document} ';
                   1174: 		    } else {
1.382     albertel 1175: 			$result .= $endminipage;
1.262     sakharuk 1176: 		    }
1.159     albertel 1177: 		}
                   1178: 	    }
                   1179: 	}
                   1180: 	if ($target eq 'grade') {
                   1181: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                   1182: 	    &finalize_storage();
                   1183: 	}
1.284     albertel 1184: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                   1185: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel 1186: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel 1187: 	                        # normally we get it from above, but in CSTR
1.172     albertel 1188: 	                        # we always show answer mode too.
1.159     albertel 1189: 	}
                   1190:     } elsif ($target eq 'meta') {
                   1191: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel 1192: 	    @Apache::inputtags::response=();
1.159     albertel 1193: 	    $result=&Apache::response::mandatory_part_meta;
                   1194: 	}
1.215     albertel 1195: 	$result.=&Apache::response::meta_part_order();
1.258     albertel 1196: 	$result.=&Apache::response::meta_response_order();
1.159     albertel 1197:     } elsif ($target eq 'edit') {
                   1198: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel 1199: 	$result .= &problem_edit_footer();
1.320     albertel 1200:     } elsif ($target eq 'modified') {
                   1201: 	 $result .= $token->[2];
1.159     albertel 1202:     }
1.155     albertel 1203: 
1.284     albertel 1204:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel 1205: 	&Apache::inputtags::check_for_duplicate_ids();
                   1206:     }
1.204     albertel 1207: 
                   1208:     &reset_problem_globals('problem');
1.159     albertel 1209: 
                   1210:     return $result;
1.48      albertel 1211: }
                   1212: 
1.108     albertel 1213: 
1.48      albertel 1214: sub start_library {
1.159     albertel 1215:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel 1216:     my ($result,$form_tag_start);
1.371     albertel 1217:     if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1.244     albertel 1218: 	&init_problem_globals('library');
                   1219: 	$Apache::lonhomework::type='problem';
                   1220:     }
1.159     albertel 1221:     if ($target eq 'edit') {
1.343     albertel 1222: 	($result,$form_tag_start)=
                   1223: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1224: 			'Edit');
                   1225: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel 1226: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1227: 	$result.=$temp;
                   1228:     } elsif ($target eq 'modified') {
                   1229: 	$result=$token->[4];
1.340     albertel 1230:     } elsif (($target eq 'web' || $target eq 'webgrade')
1.371     albertel 1231: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1.340     albertel 1232: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel 1233: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel 1234: 	($result,$form_tag_start)=
                   1235: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1236: 			$name);
1.159     albertel 1237: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel 1238: 	$result.=" \n $form_tag_start".	
1.159     albertel 1239: 		  '<input type="hidden" name="submitted" value="yes" />';
                   1240: 	$result.=&problem_web_to_edit_header($rndseed);
1.428     raeburn  1241:         if ($Apache::lonhomework::type eq 'practice') {
                   1242:             $result.= '<input type="submit" name="resetdata" '.
                   1243:                       'value="'.&mt('New Problem Variation').'" />'.
                   1244:                       &practice_problem_header().'<hr />';
                   1245:         }
1.159     albertel 1246:     }
                   1247:     return $result;
1.48      albertel 1248: }
                   1249: 
                   1250: sub end_library {
1.159     albertel 1251:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1252:     my $result='';
                   1253:     if ($target eq 'edit') {
                   1254: 	$result=&problem_edit_footer();
1.371     albertel 1255:     } elsif ($target eq 'web' 
                   1256: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
                   1257: 	     && $env{'request.state'} eq "construct") {
1.349     albertel 1258: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1259:     }
1.371     albertel 1260:     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
                   1261: 	&reset_problem_globals('library');
                   1262:     }
1.159     albertel 1263:     return $result;
1.197     www      1264: }
                   1265: 
                   1266: sub start_definetag {
1.326     albertel 1267:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1268: 
                   1269:     my $result;
                   1270: 
                   1271:     my $name = $token->[2]->{'name'};
1.326     albertel 1272:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.396     albertel 1273:     if ($target eq 'web') {
                   1274: 	if ($name=~/^\//) {
                   1275: 	    $result=
                   1276: 		'<br /><table class="LC_sty_end"><tr><th>'.
                   1277: 		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1278: 	} else {
                   1279: 	    $result=
                   1280: 		'<br /><table class="LC_sty_begin"><tr><th>'.
                   1281: 		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1282: 	}
                   1283: 	$skip = &HTML::Entities::encode($skip, '<>&"');
                   1284: 	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1.197     www      1285:     }
                   1286:     return $result;
                   1287: }
                   1288: 
                   1289: sub end_definetag {
                   1290:     return '';
1.1       albertel 1291: }
                   1292: 
                   1293: sub start_block {
1.201     albertel 1294:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1295: 
                   1296:     my $result;
1.1       albertel 1297: 
1.339     albertel 1298:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1299: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1300: 	my $code = $token->[2]->{'condition'};
1.385     albertel 1301: 	if (defined($code) && $code ne '') {
1.137     albertel 1302: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1303: 		&Apache::lonxml::default_homework_load($safeeval);
                   1304: 	    }
1.131     albertel 1305: 	    $result = &Apache::run::run($code,$safeeval);
                   1306: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1307: 	} else {
                   1308: 	    $result='1';
                   1309: 	}
                   1310: 	if ( ! $result ) {
1.201     albertel 1311: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1312: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1313: 	}
                   1314: 	$result='';
                   1315:     } elsif ($target eq 'edit') {
                   1316: 	$result .=&Apache::edit::tag_start($target,$token);
                   1317: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1318: 					  $token,40);
                   1319: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1320:     } elsif ($target eq 'modified') {
                   1321: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1322: 						     $safeeval,'condition');
                   1323: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1324:     }
1.131     albertel 1325:     return $result;
1.1       albertel 1326: }
                   1327: 
                   1328: sub end_block {
1.167     www      1329:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1330:     my $result;
                   1331:     if ($target eq "edit") {
                   1332: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1333:     }
                   1334:     return $result;
                   1335: }
                   1336: 
                   1337: sub start_languageblock {
1.201     albertel 1338:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1339: 
                   1340:     my $result;
                   1341: 
1.339     albertel 1342:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1343: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1344: 	my $include = $token->[2]->{'include'};
                   1345: 	my $exclude = $token->[2]->{'exclude'};
1.436     raeburn  1346:         my @preferred_languages=&Apache::lonlocal::preferred_languages();
1.394     www      1347: # This should not even happen, since we should at least have the server language
1.398     www      1348:         if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }
                   1349: # Now loop over all languages in order of preference
                   1350:         foreach my $preferred_language (@preferred_languages) {
1.394     www      1351: # If the languageblock has no arguments, show the contents
1.399     www      1352:            $result=1;
                   1353:            my $found=0;
1.394     www      1354: # Do we have an include argument?
1.398     www      1355: 	   if ($include) {
1.394     www      1356: # If include is specified, by default, don't render the block
1.399     www      1357:               $result=0;
1.398     www      1358:               foreach my $included_language (split(/\,/,$include)) {
1.394     www      1359: # ... but if my preferred language is included, render it
1.398     www      1360:                  if ($included_language eq $preferred_language) {
1.399     www      1361:                     $result=1; 
                   1362:                     $found=1; 
1.398     www      1363:                  }
                   1364:               }
                   1365: 	   }
1.394     www      1366: # Do we have an exclude argument?
1.398     www      1367:            if ($exclude) {
1.399     www      1368:               $result=1;
1.398     www      1369:               foreach my $excluded_language (split(/\,/,$exclude)) {
                   1370:                  if ($excluded_language eq $preferred_language) {
1.399     www      1371:                     $result=0;
                   1372:                     $found=1;
1.398     www      1373:                  }
                   1374:               }
                   1375: 	   }
1.399     www      1376:            if ($found) { last; }
1.398     www      1377:         }
1.201     albertel 1378: 	if ( ! $result ) {
                   1379: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1380: 						   $style);
                   1381: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1382: 	}
                   1383: 	$result='';
1.167     www      1384:     } elsif ($target eq 'edit') {
                   1385: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1386: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1387: 					  $token,40);
1.211     albertel 1388: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1389: 					  $token,40);
                   1390: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1391:     } elsif ($target eq 'modified') {
                   1392: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1393: 						     $safeeval,'include',
                   1394: 						     'exclude');
1.167     www      1395: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1396:     }
                   1397:     return $result;
                   1398: }
                   1399: 
                   1400: sub end_languageblock {
1.170     www      1401:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1402:     my $result;
1.201     albertel 1403:     if ($target eq "edit") {
1.170     www      1404: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1405:     }
                   1406:     return $result;
                   1407: }
                   1408: 
1.397     albertel 1409: {
                   1410:     my %available_texts;
                   1411:     sub start_translated {
                   1412: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1413: 	&Apache::lonxml::register('Apache::structuretags',('lang'));
                   1414: 	undef(%available_texts);
                   1415:     }
                   1416:     
                   1417:     sub end_translated {
                   1418: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1419: 	my $result;
                   1420: 	#show the translation on viewable targets
                   1421: 	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
                   1422: 	    # or non-viewable targets, if it's embedded in something that
                   1423: 	    # wants the output
                   1424: 	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
                   1425: 	     && &Apache::lonxml::in_redirection() ) ) {
                   1426: 	    my @possibilities = keys(%available_texts);
                   1427: 	    my $which = 
                   1428: 		&Apache::loncommon::languages(\@possibilities) || 'default';
                   1429: 	    $result = $available_texts{$which};
                   1430: 	}
                   1431: 	undef(%available_texts);
                   1432: 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
                   1433: 	return $result;
                   1434:     }
                   1435: 
                   1436: 
                   1437:     sub start_lang {
                   1438: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1439: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1440: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1441: 	    &Apache::lonxml::startredirection();
                   1442: 	}
                   1443: 	return '';
                   1444:     }
                   1445: 
                   1446:     sub end_lang {
                   1447: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1448: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1449: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1450: 	    my $result = &Apache::lonxml::endredirection();
                   1451: 	    my $which = &Apache::lonxml::get_param('which',$parstack,
                   1452: 						   $safeeval);
1.431     raeburn  1453:             if ($which=~/\w/) {
                   1454:                 $available_texts{$which} = $result;
                   1455:             }
                   1456:             my $otherlangs = &Apache::lonxml::get_param('other',$parstack,
                   1457:                                                         $safeeval);
                   1458:             foreach my $language (split(/\s*\,\s*/,$otherlangs)) {
                   1459:                 if ($language=~/\w/) {
                   1460:                     $available_texts{$language} = $result;
                   1461:                 }
1.427     bisitz   1462:             }
                   1463: 
1.397     albertel 1464: 	}
                   1465: 	return '';
                   1466:     }
                   1467: }
                   1468: 
1.170     www      1469: sub start_instructorcomment {
1.201     albertel 1470:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1471: 
                   1472:     my $result;
                   1473: 
1.339     albertel 1474:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1475: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1476:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1477: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1478: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1479: 						   $parser,$style);
1.170     www      1480: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1481: 	}
                   1482: 	$result='';
                   1483:     } elsif ($target eq 'edit') {
                   1484: 	$result .=&Apache::edit::tag_start($target,$token);
                   1485: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1486:     }
                   1487:     return $result;
                   1488: }
                   1489: 
                   1490: sub end_instructorcomment {
1.159     albertel 1491:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1492:     my $result;
                   1493:     if ($target eq "edit") {
                   1494: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1495:     }
                   1496:     return $result;
1.4       tsai     1497: }
                   1498: 
                   1499: sub start_while {
1.326     albertel 1500:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1501: 
1.160     albertel 1502:     my $result;
1.339     albertel 1503:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1504: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1505: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1506: 
1.160     albertel 1507: 	push( @Apache::structuretags::whileconds, $code);
                   1508: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1509: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1510: 	}
                   1511: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1512: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1513: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1514: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1515: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1516: 	if ( $result ) {
                   1517: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1518: 	}
                   1519:     } elsif ($target eq 'edit') {
                   1520: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1521: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1522: 					  $token,40);
                   1523: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1524:     } elsif ($target eq 'modified') {
                   1525: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1526: 						     $safeeval,'condition');
                   1527: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1528:     }
1.160     albertel 1529:     return $result;
1.4       tsai     1530: }
                   1531: 
                   1532: sub end_while {
1.159     albertel 1533:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1534:     my $result;
                   1535: 
1.339     albertel 1536:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1537: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1538: 	my $code = pop(@Apache::structuretags::whileconds);
                   1539: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1540: 	my $line = pop(@Apache::structuretags::whileline);
                   1541: 	my $return = &Apache::run::run($code,$safeeval);
                   1542: 	my $starttime=time;
                   1543: 	my $error=0;
                   1544: 	while ($return) {
                   1545: 	    if (time-$starttime >
                   1546: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.378     albertel 1547: 		$return = 0; $error=1; next;
1.161     albertel 1548: 	    }
                   1549: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
1.380     albertel 1550: 	    if ($target eq 'grade' || $target eq 'answer' ||
                   1551: 		$target eq 'analyze') {
                   1552: 		# grade/answer/analyze should produce no output but if we
                   1553: 		# are redirecting, the redirecter should know what to do
                   1554: 		# with the output
                   1555: 		if (!$Apache::lonxml::redirection) { undef($result); }
                   1556: 	    }
1.161     albertel 1557: 	    $return = &Apache::run::run($code,$safeeval);
                   1558: 	}
                   1559: 	if ($error) {
1.430     bisitz   1560: 	    &Apache::lonxml::error('<pre>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occurred while running &lt;while&gt; on line').' '.$line.'</pre>');
1.160     albertel 1561: 	}
                   1562:     } elsif ($target eq "edit") {
                   1563: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1564:     }
1.160     albertel 1565:     return $result;
1.1       albertel 1566: }
1.6       tsai     1567: 
1.160     albertel 1568: # <randomlist show="1">
1.6       tsai     1569: #  <tag1>..</tag1>
                   1570: #  <tag2>..</tag2>
                   1571: #  <tag3>..</tag3>
1.160     albertel 1572: #  ...
1.6       tsai     1573: # </randomlist>
                   1574: sub start_randomlist {
1.326     albertel 1575:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1576:     my $result;
1.339     albertel 1577:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1578: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1579: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1580: 	my $b_parser= HTML::LCParser->new(\$body);
                   1581: 	$b_parser->xml_mode(1);
                   1582: 	$b_parser->marked_sections(1);
1.159     albertel 1583: 	my $b_tok;
                   1584: 	my @randomlist;
                   1585: 	my $list_item;
                   1586: 	while($b_tok = $b_parser->get_token() ) {
                   1587: 	    if($b_tok->[0] eq 'S') { # start tag
                   1588: 		# get content of the tag until matching end tag
                   1589: 		# get all text upto the matching tag
                   1590: 		# and push the content into @randomlist
                   1591: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1592: 							   $b_parser);
                   1593: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1594: 		push(@randomlist,$list_item);
                   1595: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1596:                 #         $list_item</b>";
                   1597: 	    }
                   1598: 	    if($b_tok->[0] eq 'T') { # text
                   1599: 		# what to do with text in between tags?
                   1600: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1601: 	    }
                   1602: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1603: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1604: 	    # }
                   1605: 	}
1.303     albertel 1606: 	if (@randomlist) {
                   1607: 	    my @idx_arr = (0 .. $#randomlist);
                   1608: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1609: 	    my $bodytext = '';
                   1610: 	    my $show=$#randomlist;
                   1611: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1612: 	    $showarg--;
                   1613: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
1.439     raeburn  1614:             if (($target eq 'analyze') && ($env{'form.check_parts_withrandomlist'})) {
                   1615:                 my @currlist;
                   1616:                 my $part = $Apache::inputtags::part;
                   1617:                 if ($part ne '') {
                   1618:                     if (ref($Apache::lonhomework::analyze{'parts_withrandomlist'}) eq 'ARRAY') {
                   1619:                         my @currlist = @{$Apache::lonhomework::analyze{'parts_withrandomlist'}};
                   1620:                         if (!(grep(/^\Q$part\E$/,@currlist))) {
                   1621:                             push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1622:                         }
                   1623:                     } else {
                   1624:                         push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1625:                     }
                   1626:                 }
                   1627:             }
1.303     albertel 1628: 	    for(0 .. $show) {
                   1629: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1630: 	    }
                   1631: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1632: 	}
                   1633:     } elsif ($target eq 'edit' ) {
                   1634: 	$result .=&Apache::edit::tag_start($target,$token);
                   1635: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1636: 					   $token,5);
                   1637: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1638:     } elsif ($target eq 'modified' ) {
                   1639: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1640: 						     $safeeval,'show');
                   1641: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1642:     }
                   1643:     return $result;
1.7       tsai     1644: }
                   1645: 
                   1646: sub shuffle {
                   1647:     my $a=shift;
                   1648:     my $i;
1.303     albertel 1649:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1650: 	&Apache::response::pushrandomnumber();
1.159     albertel 1651: 	for($i=@$a;--$i;) {
                   1652: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1653: 	    next if $i == $j;
                   1654: 	    @$a[$i,$j] = @$a[$j,$i];
                   1655: 	}
1.251     albertel 1656: 	&Apache::response::poprandomnumber();
1.7       tsai     1657:     }
1.6       tsai     1658: }
                   1659: 
                   1660: sub end_randomlist {
1.159     albertel 1661:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1662:     my $result;
                   1663:     if ($target eq 'edit' ) {
                   1664: 	$result=&Apache::edit::tag_end($target,$token,
                   1665: 				       'End Randomly Parsed Block');
                   1666:     }
                   1667:     return $result;
1.6       tsai     1668: }
                   1669: 
1.283     albertel 1670: sub ordered_show_check {
                   1671:     my $last_part=$Apache::inputtags::partlist[-2];
                   1672:     my $in_order=
                   1673: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1674:     my $in_order_show=1;
                   1675:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1676: 	$in_order_show=&Apache::response::check_status($last_part);
                   1677:     }
                   1678:     return $in_order_show;
                   1679: }
                   1680: 
1.11      albertel 1681: sub start_part {
1.326     albertel 1682:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1683:     if (!$Apache::lonxml::metamode) {
                   1684: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1685: 	                                     # duedates.
                   1686:     }
1.159     albertel 1687:     my $result='';
1.386     albertel 1688:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
1.159     albertel 1689:     $Apache::inputtags::part=$id;
1.177     albertel 1690:     push(@Apache::inputtags::partlist,$id);
                   1691:     @Apache::inputtags::response=();
1.159     albertel 1692:     @Apache::inputtags::previous=();
                   1693:     @Apache::inputtags::previous_version=();
1.405     albertel 1694:     &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
1.403     albertel 1695:     &Apache::response::reset_params();
                   1696: 
1.159     albertel 1697:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1698:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1699:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1700:     my $in_order_show=&ordered_show_check();
1.214     albertel 1701:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1702:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1703:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1704: 
                   1705:     if ($target eq 'meta') {
1.224     www      1706: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1707: 	return &Apache::response::mandatory_part_meta.
                   1708: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1709:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1710: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1711: 	if ($hidden || !$in_order_show) {
1.326     albertel 1712: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1713: 	} else {
                   1714: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1715: 	    push (@Apache::inputtags::status,$status);
                   1716: 	    my $expression='$external::datestatus="'.$status.'";';
                   1717: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1718: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1719: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1720: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1721: 	    }
1.216     albertel 1722: 	    if (( $status eq 'CLOSED' ) ||
                   1723: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1724: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1725: 		( $status eq 'BANNED') ||
                   1726: 		( $status eq 'UNAVAILABLE') ||
                   1727: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1728: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1729: 							   $style);
1.159     albertel 1730: 		if ( $target eq "web" ) {
1.211     albertel 1731: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1732: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1733: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1734: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1735: 		    } else {
1.211     albertel 1736: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1737: 		    }
1.159     albertel 1738: 		}
                   1739: 	    } else {
                   1740: 		if ($target eq 'tex') {
1.284     albertel 1741: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1742: 			if ($$tagstack[-2] eq 'td') {
1.388     foxr     1743: 			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
1.264     sakharuk 1744: 			} else {
                   1745: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1746: 			}
1.195     sakharuk 1747: 		    }
1.159     albertel 1748: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1749: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1750: 		    my @allkeys = split /,/,$allkeys;
                   1751: 		    my $allow_print_points = 0;
                   1752: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1753: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1754: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1755: 			}
                   1756: 		    }
1.275     albertel 1757: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1758: 		    if (defined($maxtries) && $maxtries < 0) {
                   1759: 			$allow_print_points=0;
                   1760: 		    }
1.302     albertel 1761: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1762: 				    '.disableexampointprint'}) eq 'yes') {
                   1763: 			$allow_print_points=0;
                   1764: 		    }
1.222     sakharuk 1765: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1766: 		} elsif ($target eq 'web') {
1.356     www      1767: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1.159     albertel 1768: 		}
                   1769: 	    }
                   1770: 	}
                   1771:     } elsif ($target eq 'edit') {
                   1772: 	$result.=&Apache::edit::tag_start($target,$token);
                   1773: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1774: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1775: 	    '&nbsp;&nbsp;'.
                   1776: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1777: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1778:     } elsif ($target eq 'modified') {
                   1779: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1780: 						     $safeeval,'id','display');
1.159     albertel 1781: 	if ($constructtag) {
1.225     albertel 1782: 	    #limiting ids to only letters numbers, and space
1.224     www      1783: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1784: 	    $result = &Apache::edit::rebuild_tag($token);
                   1785: 	}
                   1786:     }
                   1787:     return $result;
1.11      albertel 1788: }
                   1789: 
                   1790: sub end_part {
1.159     albertel 1791:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1792:     &Apache::lonxml::debug("in end_part $target ");
                   1793:     my $status=$Apache::inputtags::status['-1'];
                   1794:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1795:     my $in_order_show=&ordered_show_check();
1.321     albertel 1796:     my $result;
                   1797:     if (!$Apache::lonxml::metamode) {
                   1798: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1799: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1800:     }
1.312     albertel 1801:     if ($target eq 'grade') {
1.249     albertel 1802: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1803: 	    !$hidden && $in_order_show) {
1.311     foxr     1804: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1805: 	} else {
                   1806: 	    # move any submission data to .hidden
                   1807: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1808: 	}
1.283     albertel 1809:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1810: 	     !$hidden && $in_order_show) {
1.159     albertel 1811: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1812: 							$target);
1.212     albertel 1813: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1814: 	    $gradestatus='';
                   1815: 	}
1.311     foxr     1816: 	$result.=$gradestatus;
1.265     sakharuk 1817: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1818:     } elsif ($target eq 'edit') {
1.311     foxr     1819: 	$result.=&Apache::edit::end_table();
1.322     albertel 1820:     } elsif ($target eq 'modified') {
                   1821: 	 $result .= $token->[2];
1.159     albertel 1822:     }
                   1823:     pop @Apache::inputtags::status;
                   1824:     $Apache::inputtags::part='';
1.295     albertel 1825:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1826:     return $result;
1.11      albertel 1827: }
1.1       albertel 1828: 
1.25      albertel 1829: sub start_preduedate {
1.326     albertel 1830:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1831:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1832: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1833: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1834: 	if (!$Apache::lonhomework::scantronmode &&
                   1835: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1836: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1837: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1838: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1839: 	}
1.24      albertel 1840:     }
1.159     albertel 1841:     return '';
1.24      albertel 1842: }
                   1843: 
1.25      albertel 1844: sub end_preduedate {
1.159     albertel 1845:     return '';
1.24      albertel 1846: }
                   1847: 
1.369     foxr     1848: # In all the modes where <postanswerdate> text is 
                   1849: # displayable,  all we do is eat up the text between the start/stop
                   1850: # tags if the conditions are not right to display it.
1.25      albertel 1851: sub start_postanswerdate {
1.326     albertel 1852:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.370     foxr     1853:     my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
                   1854: 	&Apache::lonnet::allowed('pav',
                   1855: 			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1.369     foxr     1856:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1.370     foxr     1857: 	$target eq 'tex' ) {
1.300     albertel 1858: 	if ($Apache::lonhomework::scantronmode ||
1.370     foxr     1859: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
                   1860: 	    (($target eq 'tex') && !$pav)) {
1.326     albertel 1861: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1862: 	}
                   1863:     }
                   1864:     return '';
1.24      albertel 1865: }
                   1866: 
1.25      albertel 1867: sub end_postanswerdate {
1.159     albertel 1868:     return '';
1.24      albertel 1869: }
                   1870: 
1.25      albertel 1871: sub start_notsolved {
1.326     albertel 1872:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1873:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1874: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1875: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1876: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1877: 	if ($gradestatus =~ /^correct/ &&
                   1878: 	    &Apache::response::show_answer()) {
1.159     albertel 1879: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1880: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1881: 	}
1.24      albertel 1882:     }
1.159     albertel 1883:     return '';
1.24      albertel 1884: }
                   1885: 
1.25      albertel 1886: sub end_notsolved {
1.159     albertel 1887:     return '';
1.24      albertel 1888: }
                   1889: 
                   1890: sub start_solved {
1.326     albertel 1891:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1892:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1893: 	$target eq 'tex') {
                   1894: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1895: 	if ($gradestatus !~ /^correct/ ||
                   1896: 	    !&Apache::response::show_answer()) {
1.326     albertel 1897: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1898: 	}
1.24      albertel 1899:     }
1.159     albertel 1900:     return '';
1.24      albertel 1901: }
                   1902: 
                   1903: sub end_solved {
1.248     albertel 1904:     return '';
                   1905: }
                   1906: 
                   1907: sub start_problemtype {
1.326     albertel 1908:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1909:     my $result;
1.339     albertel 1910:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1911: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1912: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1913: 	if (!defined($mode)) { $mode='show'; }
                   1914: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1915: 	my $found=0;
                   1916: 	foreach my $type (split(',',$for)) {
                   1917: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1918: 	}
                   1919: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1920: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1921: 	}
                   1922: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1923: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1924: 	}
                   1925:     } elsif ($target eq 'edit') {
                   1926: 	$result .=&Apache::edit::tag_start($target,$token);
                   1927: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1928: 					   [['show','Show'],
                   1929: 					    ['hide','Hide']]
                   1930: 					   ,$token);
                   1931: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1932: 					     [ ['exam','Exam/Quiz Problem'],
                   1933: 					       ['survey','Survey'],
1.428     raeburn  1934: 					       ['problem','Homework Problem'],
                   1935:                                                ['practice','Practice Problem'] ]
1.248     albertel 1936: 					     ,$token);
                   1937: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1938:     } elsif ($target eq 'modified') {
                   1939: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1940: 						     $safeeval,'mode','for');
                   1941: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1942:     }
                   1943:     return $result;
                   1944: }
                   1945: 
                   1946: sub end_problemtype {
1.159     albertel 1947:     return '';
1.24      albertel 1948: }
1.34      albertel 1949: 
                   1950: sub start_startouttext {
1.159     albertel 1951:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1952:     my @result=(''.'');
                   1953:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1.404     albertel 1954:     
                   1955:     my $nesting = 
                   1956: 	&Apache::lonxml::set_state('outtext',
                   1957: 				   &Apache::lonxml::get_state('outtext')+1);
                   1958:     if ($nesting > 1 && $env{'request.state'} eq 'construct') {
                   1959: 	&Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
                   1960:     }
1.159     albertel 1961:     return (@result);
1.34      albertel 1962: }
1.159     albertel 1963: 
1.34      albertel 1964: sub end_startouttext {
1.326     albertel 1965:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1966:     my $result='';
                   1967:     my $text='';
                   1968:     if ($target eq 'edit') {
1.424     foxr     1969: 	my $areaid = 'homework_edit_'.$Apache::lonxml::curdepth;
1.326     albertel 1970: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.437     raeburn  1971: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>"
1.438     bisitz   1972:                  .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.437     raeburn  1973:                  .&Apache::edit::deletelist($target,$token)
                   1974:                  .'</span></td>';
1.425     raeburn  1975:         unless ($env{'environment.wysiwygeditor'} eq 'on') {
1.434     foxr     1976: 	    $result .= '<td align="left">'
                   1977: 		.&Apache::lonhtmlcommon::dragmath_button($areaid,1)
                   1978: 		.'</td>'
                   1979: 		.'<td>'
                   1980: 		.&Apache::edit::insertlist($target,$token)
                   1981: 		.'</td>';
                   1982: 	}
1.425     raeburn  1983: 	$result.='<td align="right" valign="top">' .
1.434     foxr     1984: 	    &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 1985: 		 &Apache::edit::end_row().
1.362     albertel 1986:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      1987: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1988:     }
                   1989:     if ($target eq 'modified') {
1.219     albertel 1990: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1991:     }
                   1992:     if ($target eq 'tex') {
                   1993: 	$result .= '\noindent ';
                   1994:     }
                   1995:     return $result;
1.34      albertel 1996: }
1.159     albertel 1997: 
1.34      albertel 1998: sub start_endouttext {
1.159     albertel 1999:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2000:     my $result='';
                   2001:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   2002:     if ($target eq "modified") {
                   2003: 	$result='<endouttext />'.
1.377     albertel 2004: 	    &Apache::edit::handle_insertafter('startouttext');
                   2005:     }
1.404     albertel 2006: 
                   2007:     my $nesting = 
                   2008: 	&Apache::lonxml::set_state('outtext',
                   2009: 				   &Apache::lonxml::get_state('outtext')-1);
                   2010:     if ($nesting < 0 && $env{'request.state'} eq 'construct') {
                   2011: 	&Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
                   2012: 	&Apache::lonxml::set_state('outtext', 0);
                   2013:     }
1.159     albertel 2014:     return $result;
1.34      albertel 2015: }
1.159     albertel 2016: 
1.34      albertel 2017: sub end_endouttext {
1.159     albertel 2018:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2019:     my @result=('','');
                   2020:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   2021:     return (@result);
1.34      albertel 2022: }
1.159     albertel 2023: 
1.45      albertel 2024: sub delete_startouttext {
1.326     albertel 2025:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2026:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 2027:     my $text=$$parser['-1']->get_text("/endouttext");
                   2028:     my $ntoken=$$parser['-1']->get_token();
                   2029:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   2030:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   2031:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   2032:     # they did the last time round
                   2033:     &Apache::lonxml::increasedepth($ntoken);
                   2034:     &Apache::lonxml::decreasedepth($ntoken);
                   2035:     return 1;
1.193     www      2036: }
                   2037: 
                   2038: sub start_simpleeditbutton {
                   2039:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2040:     my $result='';
1.284     albertel 2041:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 2042: 	($target eq 'web') &&
1.330     albertel 2043:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 2044:         my $url=$env{'request.noversionuri'};
1.193     www      2045:         $url=~s/\?.*$//;
1.367     albertel 2046: 	my ($symb) = &Apache::lonnet::whichuser();
1.442     bisitz   2047: #       Warning make more sense and is more important on edit screen
                   2048: #       $result='<p class="LC_warning">'
                   2049: #              .&mt('Note: it can take up to 10 minutes for changes to take effect for all users.')
                   2050: #              .&Apache::loncommon::help_open_topic('Caching')
                   2051: #              .'</p>';
                   2052:         $result.=&Apache::lontemplate::start_functionslist()
                   2053:                 .&Apache::lontemplate::item_functionslist(
                   2054:                      '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'.&mt('Edit').'</a>')
                   2055:                 .&Apache::lontemplate::end_functionslist();
                   2056: 
1.193     www      2057:     }
                   2058:     return $result;
                   2059: }
                   2060: 
                   2061: sub end_simpleeditbutton {
                   2062:     return '';
1.45      albertel 2063: }
1.34      albertel 2064: 
1.428     raeburn  2065: sub practice_problem_header {
                   2066:     return '<span class="LC_info"><h3>'.&mt('Practice Problem').'</h3></span>'.
                   2067:            '<span class="LC_info">'.&mt('Submissions are not permanently recorded').
                   2068:            '</span>';
                   2069: }
                   2070: 
1.1       albertel 2071: 1;
                   2072: __END__
1.435     jms      2073: 
                   2074: =pod
                   2075: 
                   2076: =back
                   2077: 
                   2078: =cut

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